/*
 * Copyright 2020-2024 Typelevel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package catseffect

import cats.effect.{ExitCode, IO, IOApp}

import java.io.{File, FileWriter}

package examples {
  object Finalizers extends IOApp {

    def writeToFile(string: String, file: File): IO[Unit] =
      IO(new FileWriter(file)).bracket { writer => IO(writer.write(string)) }(writer =>
        IO(writer.close()))

    def run(args: List[String]): IO[ExitCode] =
      (IO(println("Started")) >> IO.never)
        .onCancel(writeToFile("canceled", new File(args.head)))
        .as(ExitCode.Success)
  }
}
